【摘要】：中國是一個(gè)滑坡災(zāi)害極為頻繁的國家,尤其是我國黃土地區(qū),滑坡更是以規(guī)模大、機(jī)制復(fù)雜、危害大等特點(diǎn)著稱于世。所以滑裂面的確定與滑坡治理已經(jīng)成為當(dāng)前亟需解決的重要課題。但現(xiàn)有滑裂面搜索方法既難以保證所確定的臨界滑面的準(zhǔn)確性,又容易在計(jì)算過程中陷入局部最小值陷阱,而且搜索范圍廣、工作量大。為了解決上述難題,本文以陜北某卸油臺(tái)高邊坡工程為背景,基于坐標(biāo)輪換法與變度量法,提出了交替變度量法,并與有限元強(qiáng)度折減法結(jié)合,探討一種邊坡最小安全系數(shù)及任意形狀臨界滑動(dòng)面的搜索技術(shù)。另外,本文還對(duì)該邊坡的加固措施進(jìn)行了優(yōu)化研究。本文主要研究內(nèi)容如下:(1)詳細(xì)闡述強(qiáng)度折減法現(xiàn)存問題,對(duì)邊坡失穩(wěn)判別標(biāo)準(zhǔn)進(jìn)行探討;通過理論和實(shí)例分析研究彈性模量E與泊松比μ的調(diào)整對(duì)有限元強(qiáng)度折減法分析結(jié)果的影響。(2)本文應(yīng)用MATLAB軟件編制交替變度量法應(yīng)用程序,并與有限元強(qiáng)度折減法結(jié)合搜索陜北某卸油臺(tái)邊坡臨界滑動(dòng)面,通過與現(xiàn)場實(shí)測(cè)數(shù)據(jù)進(jìn)行對(duì)比,論證其可行性及實(shí)用性。(3)由于陜北某卸油臺(tái)滑坡工程地質(zhì)復(fù)雜,為了有效的模擬抗滑樁的工作機(jī)理,本文采用ABAQUS軟件建立三維模型進(jìn)行數(shù)值模擬。針對(duì)抗滑樁設(shè)計(jì)方面存在的問題,從排距、樁間距、樁身截面尺寸等方面展開研究工作,為今后復(fù)雜黃土邊坡中的抗滑樁加固設(shè)計(jì)提供參考。
[Abstract]:China is a country with frequent landslide disasters, especially in loess area of China. Landslide is famous for its large scale, complex mechanism and great harm. Therefore, the determination of sliding surface and landslide treatment has become an important issue that needs to be solved. However, it is difficult to guarantee the accuracy of the critical sliding surface and fall into the local minimum trap in the course of calculation. Moreover, the scope of search is wide and the workload is large. In order to solve the above problems, based on the coordinate rotation method and variable metric method, the alternating variable metric method is put forward in this paper, which is combined with the finite element strength reduction method, and based on the background of the high slope engineering of a certain oil unloading platform in Northern Shaanxi. A search technique for the minimum safety factor of slope and the critical sliding surface with arbitrary shape is discussed. In addition, this paper also carries on the optimization research to the slope reinforcement measure. The main contents of this paper are as follows: (1) the existing problems of strength reduction method are described in detail, and the criteria for judging slope instability are discussed. The influence of the adjustment of elastic modulus E and Poisson's ratio 渭 on the results of the finite element strength reduction method is studied through theoretical and practical analysis. (2) the application program of alternating variable measure method is compiled by MATLAB software in this paper. And combined with the finite element strength reduction method to search the critical sliding surface of a unloading platform slope in Northern Shaanxi, the feasibility and practicability of the landslide are proved by comparing with the field measured data. (3) the engineering geology of a unloading platform landslide in Northern Shaanxi is complicated. In order to simulate the working mechanism of anti-slide pile effectively, Abaqus software is used to establish three-dimensional model for numerical simulation. Aiming at the problems existing in the design of anti-slide pile, the research work is carried out from the aspects of row spacing, pile spacing and pile cross-section size, which provides a reference for the reinforcement design of anti-slide pile in the complex loess slope in the future.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU444;P642.22

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